Auto valve grinder



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Patented Jan. 3, 19226 J. R. MILLER.

AUTO VALVE GRINDER.

APPLICATION man DEC.I3, 1919.

wawm Parent orr cn.

JAMES R. MILLER, or MCRAE, GEORGIA.

AU TO VALVE GRINDER.

. Specification of Letters Patent.

Application filed December 13, 1919, Serial No. 344,681.

To all whom it may concern Be it known that 1. JAMES. R. MILLER, a citizen of the United States, residing at Mcltae, in the county of Telfair and State of Georgia, have invented a new and useful Auto Valve Grinder, of which the following is a specification.

The device forming the subject matter of this application is a valve grinder, wherein the shaft which turns the valve, is mounted for longitudinal sliding movement, and one object of the invention. is to provide novel means whereby, at will, longitudinal movement may be imparted to the shaft, in addition to the normal rotatory movement through which the grinding is brought about. Another object of the invention is to provide a tool of the sort mentioned which will hold a detached valve cage, as distinguished from securing the tool to the engine, or operating the tool upon the engine, thereby to grind the valve in situ.

In the accompanying drawings Figure 1 is a front elevation of my improved auto valve grinder.

Figure 2 is a. vertical sectional view taken on the line 2-2 of Figure 1 and looking in the direction indicated by the arrows.

Figure 3 is a horizontal cross sectional view taken on the line 33 and looking downwardly in the direction indicated by the arrows portions of the manually actuated rack bar being omitted, and

Figure 4 is a bottom plan of the device.

The valve grinder includes a frame, comprising parallel side members and 11, connected at one end by a screw 12 supporting a handle 13, spacing the members 10-11.

Disposed below the handle 13 and connecting the side members 10 and 11 are transverse supports or plates 1 1 and 15, which render the frame rigidat its upper end. The plates 14 and 15 are provided respectively, with bearing sleeves 16 and 17, in which is journaled a vertical shaft 18 having at its lower end an enlarged portion 19 provided with a socket 20. The upper end of the shaft 18 is surrounded by an expansible helical spring 24 which engages an abutment or nut 25 on the upper end of the shaft, and bears against the plate 14, so as to exert upward thrust on the shaft 18, for a purpose to be hereinafter explained. The pressure exerted by the spring 24 against the shaft 18, can be regulated by means of the adjusting nut 25.

Vertically slidable. in the plates 14 and 15 near the side member 10, is a plunger 26 preferably of rectangular cross section and operating through alined vertical openings 27 in the plates 14 and 15, the plunger being Patented J an. 3, 1922.

The plunger 26 is normally elevated by the Y action of the spring. On the shaft 18 is fixed a pinion 31 which is horizontally disposed between the plates 14 and 15. Vertically mounte'd in horizontally spaced relation at either side of the 1 plunger 26 and located on the side member 10, are two bearing plates 32, each provided with an inverted L-shaped opening or slot havinga vertical extension 34, said slot receiving for sliding movement, a manu ally operated rack bar 35 which is provided at one end with a handle 36. The rack bar 35 is designed to be reciprocated in the slots or openings and is provided with a longitudinal rib 37 receivedin the extension 34 of the slot 33, and guiding the rack bar during its reciprocation. Since the teeth 38 of the rack bar 35 terminate short of the ends of the rack bar. as shown at 41, the maximum length of the stroke of the rack bar is determined. The lower face of the rack bar at its free end is provided with a cam rib 39 which is adapted to enter the lower portions of the slots 33. The plunger 26 is'provided with a vertical recess 10 of greater length than the combined thickness of the rack bar 35 and the cam rib 39, and as the rack bar is drawn inwardly, the cam rib 39 engages the shoulder formed by the bottom edge of the recess 10 and thereby cause the plunger to be moved downwardly. Since the arm 29 of the'plunger 26 engages the upper end of the shaft 18, the shaft will be" moved downwardly against theaction of the s'pring 24, thereby to unseat the valve, from its seat as will be described hereinafter. 7

The side members 10 and 11 carry, respectively, inwardly projecting jaws 42 and 13 near their lower ends, the jaws 42 being located'in spaced relation onthesjide mem V berlO and the jaw 43 being located on the side member '11 in staggardf re1ationinter-' mediately ofthe jaws 42. All of saidjaws 'are'provided with con'caved inner faces, so as tO IGCG IVB valve'eage 44; of the usual type;

the valve stem appearing at 4 5. The valve stem 45 is provided With'an opening 46' V l and the socketed member 19 is provided with an alined opening for receiving a eotter pin 47 or the like whereby the valve stem can be coupledf to the shaft- 18. The cage l l'is held between the jaws '42 and 43, the lower extremities of the side members 10 and ll being resilientfor movement toward and away from each, other. The ends of 'the members 10 and ll are re ceived in a resilient loop 48, said loop having parallel' 'end portions e9," one of which 18 split, and outwardly convexed side portions-50 adapted to accommodate the cage 44 'of'the valve 51;;The valve 51 is held by the spring 24 in frictional engagement with its; seat. When the rack bar and the pinion 3l'impart rotation to :the shat-t 18, tl1e valve 51 willbe oscillated and by the application of abrasive material between thevalve and its seat, foreign matter will be V removed and the'valve ground. lThea'pplicaihy' reason 'of the unseating of the valve 51 7 7 through the medium of the cam rib 39 and the. shoulder atthe lower end of the recess V min the plunger 26, these elements Cans tion of the abrasive material is facilitated ing the 18 to movedownwardly against the action of 1ts spring 24 arm 29 hearing 7' on the shaft This operation also/serves V to "dislodge and permit the, discharge of any particlesiwhich' have been removed from the valve or'its seat, It will be understood that" the device canfbe operated While the wo'rlnnan is maintaining a substantially erect posture. V The valve cage' le is clamped V theh'ahdle IS an'd the points 53 afford a hold seated on the cage. will not slip when" invpositionby means of afbinding screw 52 xwhich is threaded, into one ot the side portions 29 ofthe, loop 48and the side member 11 "of; the frame thus forcing the jaws 4:2"and e3 to flhecage 14 4 can "beadjustec vertically beeontao'ts" with grip theflca'ge.

tweenfthe jaws t2-+ l3,so" that When the e -"ice is F operated, the valve 51 flpb Inorder that the tool V V I in use the lower e1 tremlties of the side memberslO and lljare formed with projecting points'53. The tool is held in "the left hand through the medium of 1 upon a work bench. It is to be understood thatwhen the'device is beingused to grind avalveithe'rack bar 35' is not shiftedcsufli .ci entlyso that the cam rib '39V Will cause the Y j nnseating ofthe valve.

7 Thevalve is unseated jonly' when it is desired to insert designed: to hold a valve cage provided with 'a valve seat, a valve head and a spindle on a valve'h'ead rotatably carried by thecage a shaftjournaled vertically int-he frame,

imeans to'limit the shaft in one direction,

a socket at one end of the shaft for eou- I pling the same to the vva l vevstem, spring means coacting between the frame and the shaft, to hold the valve against its seat under tension, a'pinion on the shaft, a rack barslidable in the frame and engageable V with said pinio'nfsaid rack bar; being prd vldedwlth means wherebyat may be 1'e-' ciprooated, a plunger slidable in the frame and engaging one end of the shaft, said shaft being held in contactyvith the plunger, andfmea'nscooperative between the rack bar and plungeravhereby the latter may be shifted at the limit of the 7 stroke of the rack bar to shift the plunger whereby to I shift the shaft forlunseating the valve. 7

2711i a valve grinder,a frame; a shaft I jou rnaled inthe frame and movable long-L tudinally'therein; a pinionon theshatt; a

rack barslidable in the frame and mesh ing with the pinion; a plunger mounted for reclprocatlon in" the frame and forming an abutment fonthe shaft; and intereng' agingelements'on the 1*ack'bar and onthe plunger cooperating to impart longitudinal .move ment to the shaft when the rack bar is .reciprocated beyond a predetermined point.

'3. In a valv'e grindeiga frame; a shaft 'journaled in the frameand movable longitudinally therein; a pinion carried byfthe V aft 1 a rack "bar slid'able in the frame and meshing with the pinion; a plunger, slidable in the trameand forming an abutment for thelsh'aft; and'a cam rib 'on the rack bar and coasting with the plungerto impart longitudinal movement thereto and: tothe shaft, when the rack {ban is moved beyond predeterminedpoint; I V 'In testimonyithatIelaim theforegoing as my own, I, havefhereto aflixed my signature inthe presence of two Witnesses.

Witness'esfn v )SALLIEOUTLAR, r V .M. A. CAMERONL'L" ,j

JAMES'IR. MI Lnn, 

